Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 330 PM EST Fri Jan 15 2021 Valid 00Z Sat Jan 16 2021 - 00Z Mon Jan 18 2021 ...A large storm produces snow and rain over parts of the Midwest into the Northeast Through Sunday... ...Record-breaking warmth along with an elevated to critical fire weather threat is expected over Southern California on Saturday... A large storm over the Midwest will slowly move Northeastward to Southeastern Canada by Sunday evening. The system will produce light snow over parts of the Midwest through Sunday evening. As the associated front moves eastward, rain will move into the Lower Great Lakes, the Mid-Atlantic, and the Southeast on Friday evening. Light snow will continue over most of the Midwest, moving into parts of the Central Appalachians and parts of the Tennessee Valley. Overnight Friday, rain and snow will move into the Northeast, continuing into Saturday. There will be heavy lake effect snow down wind from Lakes Erie and Ontario and into the Northern Green and White Mountains of New Hampshire and Vermont . The light snow will continue over the Midwest and parts of the Northeast through Sunday evening. The snow will produce hazardous driving conditions. Meanwhile, high pressure builds over the Northwest through Saturday night. Above-average to record-breaking temperatures are expected across much of Southern California into Nevada and Arizona on Saturday. Gusty winds and low humidities are prompting Red Flag Warnings for portions of Southern California. Temperatures will likely remain well above average, with dry conditions persisting through Saturday and Sunday. Overnight Saturday, a front will move onshore over the Northwest, producing rain and higher elevation snow over the Pacific Northwest and also snow over parts of the Northern Intermountain Region into parts of the Northern Rockies. By Sunday evening, the system will move inland to the Northern High Plains producing mainly snow and some lower elevation rain. The snow will create hazardous driving conditions. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php